KR20100006891A - Polyvinylchloride artificial leather having high reflecting infrared ray - Google Patents

Abstract

PURPOSE: Polyvinylchloride artificial leather having high reflecting infrared rays is provided to reduce the absorption volume of infrared rays drastically with pigments, and to reduce the temperature rising of the artificial leather efficinectly. CONSTITUTION: Polyvinylchloride artificial leather having high reflecting infrared rays includes the following: a surface layer(3) including polyvinyl chloride resin of 85 ~ 95 weight%, parylene black pigment, and carbon black pigment of 1 ~ 12 weight%; a foaming layer(4) including the polyvinyl chloride resin of 45 ~ 60 weight%, titanium dioxide pigment of 15 ~ 25 weight% and the plasticizer of 25 ~ 40 weight%; and a base layer(5) including polyester fiber containing titanium dioxide pigment of 2 ~ 7 weight%.

Description

Polyvinylchloride artificial leather having high reflecting infrared ray}

The present invention is a surface layer comprising a black pigment mixed with a perylene black pigment and a carbon black pigment; A foam layer comprising a white titanium dioxide pigment and a polyvinyl chloride resin; And a base layer comprising a polyester fiber containing a white titanium dioxide pigment. The present invention relates to an infrared highly reflective polyvinyl chloride-based artificial leather, wherein the artificial leather of the present invention transmits infrared rays through a surface layer, By reflecting from the foam layer and the substrate layer, not only can the temperature rise force of the artificial leather itself be reduced, but also the touch is excellent.

Generally speaking, the leather we talk about is largely divided into natural leather and artificial leather. Natural leather is a processed leather of animals, which is limited in production, expensive, and made of sheet. It is difficult to expect quality uniformity. On the other hand, artificial leather refers to the manufacture of close to natural leather using a textile material such as non-woven fabric, woven fabric, and serves to compensate for the above disadvantages that natural leather has. However, artificial leather is still inferior to natural leather in terms of tactile feeling.

Background Art [0002] The synthetic leather for various purposes made by mixing a single polymer product or the same synthetic material may be insufficient in satisfying consumer's advanced tendency in color, gloss, processability, design and texture. In particular, among the automobile interior materials, the car seat is the part that requires excellent excellence not only in functional characteristics but also in terms of sensibility and touch because of the widest contact area with the human body. Polyvinyl chloride artificial leather is widely used as a material for the seat covering, but in terms of sensitivity, it has a characteristic of being lowered compared to natural cowhide properties.

In particular, in the summer, when the ambient temperature of the car rises to a high temperature, the surface temperature of the artificial leather applied by the seat covering rises up to 70 ° C, which causes various problems. For example, problems such as high temperature felt during seating, change in glossiness of artificial leather, cracking in long-term use, or bleaching due to the surface migration of plasticizers added during artificial leather production occur.

Accordingly, the present inventors have tried to find a way to suppress the surface temperature rise of the artificial leather, as a result of transmitting the light without absorbing infrared rays in the surface layer constituting the artificial leather, and reflects the infrared rays from the foam layer and the base layer, artificial leather itself Has been found to reduce the total amount of infrared radiation absorbed by the present invention, thereby introducing a black pigment and a white titanium dioxide pigment mixed with a perylene black pigment and a carbon black pigment into the surface layer, the foam layer and the substrate layer. A method of controlling the thickness of the layer has been devised. That is, an object of the present invention is to provide a polyvinyl chloride-based artificial leather that significantly reduced the absorption of infrared rays by using the pigments.

The present invention relates to an infrared high reflection polyvinyl chloride artificial leather,

A surface layer comprising a polyvinyl chloride resin, a black pigment mixed with a perylene black pigment and a carbon black pigment, and a plasticizer; A foam layer comprising a polyvinyl chloride resin, a titanium dioxide pigment and a plasticizer; And a base layer comprising polyester fibers containing 2 to 7 wt% of titanium dioxide pigment.

The artificial leather of the present invention introduced above has a low amount of infrared absorption of the artificial leather itself, and especially in the summer when the amount of sunshine and sunshine is strong, the high temperature and the gloss change of the artificial leather, which occurs due to the temperature rise of the artificial leather itself, is felt. In addition, it is possible to prevent problems such as whitening phenomenon due to crack generation during long-term use and surface migration of the plasticizer added during the manufacture of artificial leather.

The composition ratio of the compositions constituting the infrared high reflection polyvinyl chloride artificial leather of the present invention as described in more detail as follows.

Infrared high reflection polyvinyl chloride artificial leather of the present invention

85 to 95% by weight of polyvinyl chloride resin, 1 to 12% by weight of black pigment obtained by mixing perylene black pigment and carbon black pigment; And 1) surface layer comprising 1 to 10 wt% of a plasticizer;

45 to 60% by weight polyvinyl chloride resin, 15 to 25% by weight titanium dioxide pigment, and

2) a foaming layer comprising 25 to 40% by weight of a plasticizer; And

3) base layer comprising a polyester fiber containing 2 to 7% by weight of titanium dioxide pigment, characterized in that it includes, as shown in Figure 1 as a schematic diagram.

In addition, the infrared highly reflective polyvinyl chloride artificial leather of the present invention may further include a coating layer according to its use.

The surface layer 1 reflects visible light and passes infrared rays. In the surface layer, the polyvinyl chloride resin (hereinafter referred to as "PVC resin") has an average molecular weight of 1000 to 1500 g / mol. In this case, when the average molecular weight of the PVC resin is less than 1000 g / mol, the wearability and tensile strength may be reduced when the cotton sheet covering is applied. It may be good to use a PVC resin having an average molecular weight in the above range because it may cause a problem of overload during processing. The PVC resin is preferably used in an amount of 85 to 95% by weight, more preferably 85 to 90% by weight, based on the total weight of the composition used in the surface layer. It is preferable to use within the above-mentioned range because a problem of deterioration of wear resistance and durability may occur, and fabrication may be impossible due to an excessively high melt viscosity when exceeding 95% by weight.

When describing the black pigment, the black pigment is used to realize the black color of the artificial leather, it is commonly used a black pigment carbon black, aniline black, iron oxide black and chromium oxide black or tricolor mixture, In general, carbon black is widely used. Since the black pigment absorbs light having a wavelength ranging from the ultraviolet region to the far infrared region, that is, solar infrared rays and thermal radiation, the material colored using the black pigment is very significantly heated under direct solar radiation. However, the present invention is characterized by using a black pigment obtained by mixing a perylene black pigment and a carbon black pigment by applying a perylene black pigment.

Perylene black pigments are N, N'-di-bis (2- (4-phenyl) ethyl) perylene-3,4,9,10-bis (dicarbosimide {N, N'-di-bis (2 -(4-phenyl) ethyl) perylene-3,4,9,10-bis (dicarboximide)}, which is transparent to light in the infrared region, and has an absorption band of about 650 nm to 700 nm for the entire visible spectral region The perylene black pigment is therefore not neutral black, but has a greenish tinge, more specifically, a greenish color with reduced whiteness. Therefore, in the present invention, not only the perylene black pigment is used alone, but also carbon black pigment is additionally used to realize a complete black color.1) The black pigment, which is one of the composition of the surface layer, is a composition of the surface layer. 1 to 12% by weight based on total weight is available There, where the black pigment is less than 1% by weight may cause a problem that the irregularity problem of the flower color implementation occurs, and the economic efficiency of the final product due to excessive addition of the pigment it exceeds 12% by weight lower. In addition, the black pigment is preferably used by mixing the perylene black pigment and the carbon black pigment 1.5 to 6: 1 weight ratio, more preferably 1.5 to 4.5: 1, wherein the perylene black pigment and carbon black pigment When the mixture is used to be less than 1.5: 1 weight ratio, there may be a problem that the infrared ray permeability is lowered, and when the mixture of the perylene black pigment and carbon black pigment is used in excess of 6: 1 by weight ratio, it is not enough to implement a black color Since problems may occur, it is better to mix and use within the above range.

The plasticizer, which is one of the compositions of the surface layer, may include a phthalate plasticizer, a trimellitic acid plasticizer, an epoxy plasticizer, a polyester plasticizer, and the like, but is not particularly limited to dibutyl phthalate, Diethylhexyl phthalate, diisononyl phthalate, diisodecylphthalate, tri-ethylhexyl trimellitate, triisononyl trimellitate ) And low-molecular-weight polyester plasticizers having an average molecular weight of 1,000 to 8,000 g / mol, and more preferably trimellitic acid plasticizers and epoxy plasticizers, rather than phthalate plasticizers, which have recently been a problem with environmental hormones. And polyester plasticizers. Such a plasticizer may be used in an amount of 1 to 10% by weight based on the total weight of the compositions used in the surface layer, wherein the plasticizer may not give sufficient flexibility to artificial leather when used in less than 1% by weight, a problem in manufacturing. It may occur, and when the content exceeds 10% by weight in the process of the final product is actually used in the process of the quality of the gloss change and color change due to the transition of the fabric surface of the plasticizer may occur, it is preferable to use within the above range.

Hereinafter, 2) the foaming layer will be described in detail.

45 to 60% by weight polyvinyl chloride resin, 15 to 25% by weight titanium dioxide pigment, and

Referring to 2) a foaming layer containing 25 to 40% by weight of a plasticizer, in the present invention, the foam layer is a layer coated on one surface of the base layer, and reflects the infrared rays passing through the surface layer to a high level. The foam layer is a layer produced by calendering polyvinyl chloride resin, and aims to provide a cushioning feeling to the artificial leather. It is preferable to use 45 to 60% by weight of the PVC resin, which is one of the composition of the foam layer, based on the total weight of the foam layer, wherein the mechanical strength of the foam cell structure is less than 45% by weight of the PVC resin of the foam layer. Deterioration may cause a problem that collapse of the foam layer during use, and when the excess 60% by weight may cause a problem that the foam layer is not formed uniformly due to excessive viscosity increase, it is recommended to use within the above range, The same thing as the PVC resin of the surface layer mentioned above can be used.

The titanium dioxide pigment is a white pigment, the titanium dioxide pigment is preferably used 15 to 25% by weight, more preferably 15 to 20% by weight based on the total weight of the foam layer composition. In this case, when the titanium dioxide pigment is used at less than 15% by weight, the incident infrared reflectance is low, and thus, a temperature reduction effect of the level to be developed in the present invention may not be exhibited, which may cause a problem that it is not industrially useful. Since the elongation of the final product due to the addition of the inorganic particles is lowered, there may be a problem that is not industrially useful. Therefore, it is preferable to use within the above range. In addition, the titanium dioxide pigment is preferably used having a particle size of 20 ~ 50 ㎛, where the titanium dioxide particle size of the titanium dioxide pigment is less than 20 ㎛ or non-uniformity of the particle dispersion during the calendaring process when more than 50 ㎛ Due to the problem that the infrared reflection efficiency may be lowered, it is preferable to use a particle size within the above range.

In addition, the plasticizer, which is one of the composition of the foam layer, may use the same kind as the plasticizer for the surface layer described above, and the plasticizer used in the foam layer may be 25 to 40% by weight based on the total weight of the foam layer composition, more preferably. Preferably it is better to use 30 to 40% by weight, when the plasticizer is less than 25% by weight, the stiffness (stiffness) of the final product fabric is increased may cause problems that can not be applied to the car seat covering material In case of using the plasticizer in excess of 40% by weight, it is preferable to use it within the above range because quality problems due to plasticizer surface migration may occur in actual use due to excessive plasticizer content.

3) the substrate layer, which is one of the components of the present invention, will be described in detail.

3) The base layer is the lowest layer of artificial leather, and is bonded to the upper layer petrochemical resin as a base layer for imparting properties similar to natural leather, and selected single or two or more selected from woven fabrics, nonwoven fabrics and knitted fabrics including polyester fibers. It can be used, and can be used brushed or inorganic.

In the present invention, the base layer, unlike the existing base layer composition should have a characteristic that can reflect the infrared rays passing through the upper layer (surface layer, foam layer) to a high level, 2 to 7 weight of titanium dioxide pigment It contains polyester fiber containing%. Here, when the titanium dioxide pigment in the polyester fiber is less than 2% by weight, there is a problem that the infrared reflectance of the base layer is lowered, and when the weight is greater than 7% by weight, the effect of infrared reflection does not increase. In addition, the size of the titanium dioxide particles of the titanium dioxide pigment which is a component of the polyester fiber is preferably 1 ~ 50 ㎛, in this case, less than 1 ㎛ has a problem of fiber spinning difficult, when more than 50 ㎛ due to non-uniform particle dispersion It is preferable to use a titanium dioxide pigment having a particle size within the above range because there is a problem that the surface properties due to deterioration.

As described above, the artificial leather of the present invention includes a surface layer, a foam layer, and a base layer, wherein the thickness of the surface layer is 0.1 to 0.3 mm, the thickness of the foam layer is 0.6 to 0.9 mm, and the thickness of the base layer is 0.2. If it is preferable that it is-0.4 mm, it is preferable that the total thickness of the three layers is 1.0 to 1.5 mm. If the thickness of the surface layer is less than 0.1 mm may cause a problem of lowering the wear resistance of the surface layer of the final product, when the surface layer embossed not more than 0.3 mm may cause a problem that the embossed expression characteristics are not clear, the thickness of the foam layer due to the increase in thickness And a problem may occur in passing the infrared rays reflected from the base layer, and thereby, the effect of preventing the surface temperature rise of the artificial leather which is the effect of the present invention can be reduced. If the thickness of the foam layer is less than 0.6 mm may cause a problem that the cushion feeling is lowered after applying the seat covering, there may be a problem that excessive cushioning occurs when more than 0.9 mm. If the thickness of the base layer is less than 0.2 mm, there may be a problem that the tensile strength of the final product is lowered, and when the thickness of the substrate layer is greater than 0.4 mm, the appearance characteristics of the final product due to excessive increase in tensile strength are not smooth, and there is a problem of stiffness. If the total thickness of the artificial leather is less than 1.0 mm, there may be a problem that the industrial utilization is lowered due to a decrease in tensile strength and tear strength when using the final product seal, the appearance characteristics are stiff when 1.5 mm Due to the problem that the quality of the fabric may be degraded, it is good to use to produce a thickness within the above range.

The artificial leather of the present invention in all the forms described above can be used for the seat used in the vehicle, preferably used as artificial leather for automobile seats.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited by the following examples.

Examples 1 to 5 and Comparative Examples 1 to 3

The artificial leather was prepared by laminating the base layer, the foam layer, and the surface layer having the compositional quality and composition ratio as shown in Table 1, and Examples 1 to 5 and Comparative Examples 1 to 3 were carried out. At this time, PVC resin, titanium dioxide pigment and a plasticizer were mixed and calendered on the base material layer, and a foam layer was laminated, and the surface layer was laminated on it using a calendering method to prepare artificial leather. The surface layer was stirred and mixed with a mixture of polyvinyl chloride resin, perylene black and carbon black for 10-20 minutes in a stir-mixer, and melted using a roller at 200 ° C.

The artificial leather was manufactured so that the thickness of the surface layer was 0.2 mm, the thickness of the foam layer was 0.7 mm, and the thickness of the base layer was 0.2 mm.

Comparative Example 4

Artificial leather was manufactured in the same manner as in Example 2, but artificial leather was manufactured such that the thickness of the surface layer was 0.5 mm instead of 0.2 mm.

Experimental Example 1

Measurement of surface temperature rise force characteristics

After irradiating light to the polyvinyl chloride artificial leather prepared in Examples 1 to 5 and Comparative Examples 1 to 4 using the solar simulator, the experimental results of the measurement of the lifting force characteristics of the surface temperature were compared and evaluated in Table 3 below. Indicated. At this time, the solar simulator specifications are shown in Table 2.

Lamp type Xenon Short Arc Lamp power 150 W Light coverage 50 mm x 50 mm

division (Unit: ℃) Example Comparative example One 2 3 4 5 One 2 3 4 Temperature after 10 minutes 35 34 34 35 34 35 35 35 34 Temperature after 30 minutes 42 40 41 40 41 45 45 46 43 Temperature after 60 minutes 55 51 52 52 51 75 75 76 60

Looking at the results of the experimental example, as shown in Table 3, in the case of Examples 1 to 5 according to the present invention it can be seen that the temperature rise is significantly reduced compared to Comparative Examples 1 to 3, which is added perylene black It can be confirmed that it is due to the high reflection foam layer and the base layer effect containing the surface layer and titanium dioxide pigment. In addition, in the case of Comparative Example 4 in which the thickness of the surface layer was changed differently from the example, the surface temperature after light irradiation for 60 minutes was lower than that of Comparative Examples 1 to 3, but it was confirmed that it was higher than Examples 1 to 5.

Experimental Example 2

Physical property test

Tensile properties and burst strength of the PVC artificial leather fabrics prepared in Examples 1 to 5 and Comparative Examples 1 to 3 were measured. Tensile properties were measured by cutting the specimens presented in the following measurement method (ASTM D 638) and the physical properties were measured by the respective methods shown in the measurement method and the results are shown in Table 4 below. Tensile properties were measured using dumbbell shaped specimens.

Tensile Properties Measurement

The test specimen was made according to ASTM D 638 (Standard Test Method for Tensile Properties of Plastics), and the tensile strength (Tensile Strength) and the elongation at break were measured using a universal testing machine. .

Tensile strength (Pa) = maximum load (N) ÷ cross-sectional area of initial sample (m ² )

Elongation at Break (%) = ((Length at Break) x 100) / Initial Length

Bursting strength

According to ASTM D774, the MULLEN type bursting strength tester is a device that measures the resistance of the plastic sheet, film, fiber, feeder, etc. to the sample burst by pushing the rubber film vertically under the specified conditions. Three 100 mm specimens were taken and mounted under the surface of the tear tester to evaluate the pressure. Burst strength is the pressure at which the rubber diaphragm breaks through the specimen. The result was an average of three test pieces.

division Physical property test result Tensile Strength (MPa) Elongation at Break (%) Burst Strength (MPa) Example 1 4.8 150 1.0 Example 2 4.7 153 0.99 Example 3 4.8 149 1.0 Example 4 5.0 150 1.0 Example 5 4.9 148 0.99 Comparative Example 1 4.5 130 0.8 Comparative Example 2 4.4 138 0.9 Comparative Example 3 4.8 150 0.89 Comparative Example 4 4.9 151 0.99

As shown in Table 4, the physical property test results, the artificial leather of the present invention can be confirmed that it is very excellent in the properties of tensile strength, elongation at break, burst strength.

1 is a view showing a cross-sectional view of the infrared high reflection polyvinyl chloride-based artificial leather of the present invention.

Claims (8)

A surface layer comprising a polyvinyl chloride resin, a black pigment obtained by mixing a perylene black pigment and a carbon black pigment, and a plasticizer; A foam layer comprising a polyvinyl chloride resin, a titanium dioxide pigment, and a plasticizer; And Infrared high reflection polyvinyl chloride artificial leather, characterized in that it comprises; a substrate layer comprising a polyester fiber containing a titanium dioxide pigment. The method of claim 1, A surface layer comprising 85 to 95% by weight of a polyvinyl chloride resin, 1 to 12% by weight of a black pigment obtained by mixing a perylene black pigment and a carbon black pigment, and 1 to 10% by weight of a plasticizer; 45 to 60% by weight polyvinyl chloride resin, 15 to 25% by weight titanium dioxide pigment and Foam layer comprising 25 to 40% by weight plasticizer and An infrared high reflection polyvinyl chloride artificial leather, comprising: a substrate layer comprising polyester fibers containing 2 to 7 wt% of titanium dioxide pigment. 3. The infrared highly reflective polyvinyl chloride artificial leather according to claim 2, wherein the black pigment is a mixture of perylene black pigment and carbon black pigment in a 1.5 to 6: 1 weight ratio. According to claim 2, wherein the titanium dioxide pigment of the foam layer is infrared high reflection polyvinyl chloride artificial leather, characterized in that it comprises titanium dioxide particles of 20 ~ 50 ㎛ size. The infrared highly reflective polyvinyl chloride artificial leather of claim 2, wherein the titanium dioxide pigment of the base layer comprises titanium dioxide particles having a size of 1 to 50 µm. The method according to any one of claims 1 to 5, The artificial leather is an infrared high-reflection polyvinyl chloride artificial leather, characterized in that used for automobile seats. According to claim 1 or 2, wherein the surface layer has a thickness of 0.1 ~ 0.3 mm, the foam layer has a thickness of 0.7 ~ 0.9 mm, the base layer has a thickness of 0.2 ~ 0.4 mm, the artificial leather Infrared high reflection polyvinyl chloride artificial leather, characterized in that the total thickness is 1.0 ~ 1.5 mm. An automobile seat comprising the artificial leather of any one of claims 1 to 5.

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